[Bug target/79144] cmpstrnsi optimization breaks glibc

[amodra at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79144

--- Comment #3 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Thu Jan 19 23:19:19 2017
New Revision: 244659

URL: https://gcc.gnu.org/viewcvs?rev=244659&root=gcc&view=rev
Log:
[RS6000] PR79144, cmpstrnsi optimization breaks glibc

glibc compiled with current gcc-7 fails one test due to strcmp and
strncmp appearing in the PLT.  This is because the inline expansion of
those functions falls back to a function call, but doesn't use the asm
name for the call.

        PR target/79144
        * config/rs6000/rs6000.c (expand_strn_compare): Get the asm name
        for strcmp and strncmp from corresponding builtin decl.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c